connie mariano, the former white house doctor, who, on cnn, called the governor a time bomb. >> i'm a physician more than a democrat or republican and i worry about this man dying in office. >> she must be a genius. >> reporter: the governor questioned how she could diagnose him from her office in arizona. >> it's completely irresponsible. my 12-year-old son came to me last night and said, dad, are you going to die? >> hey, bring it, fat boy! >> chris christie said he's not going to run for re-election next year. he's like, i'll collapse that bridge when i get to it. >> reporter: his weight has been constant source of attention. christie who was slender and athletic as a young man, insists his health is still good. >> if you talk to anybody in the room that's struggled with their weight -- >> reporter: he insists his health is still good, but he's aware his weight could become a serious issue, and that he has a plan to deal with it. when you look at him, do you think he's a ticking time bomb? >> i think it's really very judgmental to have such a strong conviction when you have no inna